heavy-headed—
1. drowsy; sleepy:
- I look so sleepy this morning, warm, slightly confused and heavy-headed from too much slumber.
2. dull or stupid:
- They are prejudiced with German films because they expect them to be heavy-headed and suffer from a lack of humor.
light-headed—
1. weak, giddy and likely to faint:
- Low blood pressure can leave you feeling light-headed, sluggish or headachy.
2. having little judgment; reckless and irresponsible:
- He was more ready to contemplate war than were any in the West, and more lightheaded about the consequences.